package Practice03;

public class TestTree {
	public static void main(String[] args) {
		Tree t1=new Tree(50);
		System.out.println("这棵树"+t1.age()+"岁");
		int y=35;
		t1.grow(y);
		System.out.println(y+"年后，这棵树"+t1.age()+"岁");
	}
}
